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Did you know?

Certain chemicals, after ingestion, can be converted by the body into cyanide. Most of these chemicals have been removed from the market, but some old nail polish remover, solvents, and plastics manufacturing solutions can contain these substances.

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Astigmatism is the most common vision problem. It may accompany nearsightedness or farsightedness. It is usually caused by an irregularly shaped cornea, but sometimes it is the result of an irregularly shaped lens. Either type can be corrected by eyeglasses, contact lenses, or refractive surgery.

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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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More than 30% of American adults, and about 12% of children utilize health care approaches that were developed outside of conventional medicine.

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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

Functional MRI Scans These scans of human brains show localized average increases in neural activity Functional MRI Scans These scans of human brains show localized average increases in neural activity
Subtle Differences in Written Words Subtle Differences in Written Words
What is the meaning of life? What is the meaning of life?
Infants can segment adult speech into individual words.  Infants can segment adult speech into individual words. 
Children can fast map the meanings of words in a single exposure. Children can fast map the meanings of words in a single exposure.
The number of words correctly completed in the New York Times crossword puzzle increases with age ... The number of words correctly completed in the New York Times crossword puzzle increases with age ...
Video: Hershey Chase Experiments

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